How Pavement Works 沥青路面工作原理ppt课件.ppt

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1、HOWHOTMIXASPHALTWORKS热拌沥青工作原理HotMixAsphalt热拌沥青HowAsphaltBinderBehaves沥青结合料性能BehaviorDependson性能主要取决于：Temperature温度TimeofLoading荷载作用时间EffectofTemperature温度影响Howhardisthewater?水的硬度是多少？ASPHALTBINDER沥青结合料SolidBehavior固态性能LiquidBehavior液态性能Stiffness硬度EFFECTOFTEMPERATURE温度影响SolidBehavior固态性能HighTe

2、mperature高温LowTemperature低温LiquidBehavior液态性能WhichisBetter????哪一个更好呢？AsphaltsAandBarethesamepenetration沥青A和B的针入度是一样的AsphaltA沥青AAsphaltB沥青B黏度Viscosity-20771402752-7SUPERPAVEAsphaltBinderSpecificationSUPERPAVE沥青结合料技术指标GradingSystemBasedonClimate(PavementTemperatures)PG等级取决于气候（路面温度）(Summer夏季)

3、(Winter冬季)PG64-22PerformanceGradePG等级Average7-daymaxpavementdesigntemp(ºC)平均7天最高设计路面温度Minpavementdesigntemp(ºC)最低设计路面温度Temperature,C-202060135AsphaltBinderTests沥青结合料测试Doneatdifferenttemperatures在不同温度进行测试TestTemperatureChangesinIncrementsof6C测试温度按照每6摄氏度递增DynamicShear动态剪切,TP5G*/sind,Min1.00kPa

4、6470TestTemp测试温度@10rad/secHowtheSpecWorks技术指标如何工作？RequirementStaysSame要求保持一致TemperatureGrades温度等级HighTemperature高温58647076LowTemperature低温-22-28-34Ruleof9090度原则ModifiedAsphaltBinder改性沥青结合料Lowtemperaturefrombaseasphalt低温性能来源于基质沥青Hightemperaturechangedwithmodifier高温性能来源于改性剂RollingThinFilmOvenTe

5、st(ShortTermAging)旋转薄膜烘箱测试（短期老化）163CSimulatesConstructionAging2-12模拟施工老化过程HighTemperatureTest(Rutting)高温测试（车辙）DoneatHighTemperatureGrade在高温条件下进行FixedPlate固定盘Binder结合料2-15PressureAgingVessel压力老化容器(LongTermAging长期老化测试)SimulatesIn-ServiceAging2-14模拟使用老化过程LowTemperatureTest(Cracking)低温测试（开裂）Do

6、ne10ºCWarmerthanLowTemperatureGrade2-15TrafficSpeedEffect车速影响Dependsonspeedoftraffic车速影响Highspeed(100k/h)高速PG64-22Slowerspeed(50k/h)低速PG70-22Stoppedspeed停止（交通灯）(trafficlights)PG76-22RutResistance抗车辙RutResistance抗车辙Effectedby取决于：AggregateProperties骨料性质VolumetricProperties体积性质AirVoids孔隙STI

7、FFNESSANDTHEINDIANAPOLISMOTORSPEEDWAY印第安纳赛车场硬度ABUSYINTERSECTION繁忙路口PAVEDWITHREGULARMIX,AGE2YEAR普通路面，通车两年REPAIRPATCH维修处AGE2YEAR两岁Toosoft太软Stiffenough足够硬度RuttingInAsphaltLayer沥青层面车辙HMA15cmAggregateBase骨料基30cmSubgrade路基MixtureStiffness混合料硬度PAV